Why do we need sleep?Isaac Asimov1993·24 pages·about 20–35 minutes·1 edition1993first published1993G. Stevens Pub. · 24 pages · ENGISBN 9780836808063Playful·Whimsical·Short readAdd to Library▾Your copyA brief discussion of sleep, why we need it, what happens when we sleep, and sleep disorders.More about this bookWorth knowingWritten forMiddle gradeHow do you feel?PickReport a problem with this book